func (x *Index) GetImageInfo(fileRef *blobref.BlobRef) (*search.ImageInfo, error) {
// it might be that the key does not exist because image.DecodeConfig failed earlier
// (because of unsupported JPEG features like progressive mode).
key := keyImageSize.Key(fileRef.String())
dim, err := x.s.Get(key)
if err == ErrNotFound {
err = os.ErrNotExist
}
if err != nil {
return nil, err
}
valPart := strings.Split(dim, "|")
if len(valPart) != 2 {
return nil, fmt.Errorf("index: bogus key %q = %q", key, dim)
}
width, err := strconv.Atoi(valPart[0])
if err != nil {
return nil, fmt.Errorf("index: bogus integer at position 0 in key %q: %q", key, valPart[0])
}
height, err := strconv.Atoi(valPart[1])
if err != nil {
return nil, fmt.Errorf("index: bogus integer at position 1 in key %q: %q", key, valPart[1])
}
imgInfo := &search.ImageInfo{
Width: width,
Height: height,
}
return imgInfo, nil
}
func NewShareRef(authType string, target *blobref.BlobRef, transitive bool) *Builder {
bb := base(1, "share")
bb.m["authType"] = authType
bb.m["target"] = target.String()
bb.m["transitive"] = transitive
return bb
}
func NewShareRef(authType string, target *blobref.BlobRef, transitive bool) map[string]interface{} {
m := newCamliMap(1, "share")
m["authType"] = authType
m["target"] = target.String()
m["transitive"] = transitive
return m
}
func newClaim(permaNode *blobref.BlobRef, t time.Time, claimType string) *Builder {
bb := newMap(1, "claim")
bb.m["permaNode"] = permaNode.String()
bb.m["claimType"] = claimType
bb.SetClaimDate(t)
return bb
}
// populateMutation populates keys & values into the provided BatchMutation.
//
// the blobref can be trusted at this point (it's been fully consumed
// and verified to match), and the sniffer has been populated.
func (ix *Index) populateMutation(br *blobref.BlobRef, sniffer *BlobSniffer, bm BatchMutation) error {
bm.Set("have:"+br.String(), fmt.Sprintf("%d", sniffer.Size()))
bm.Set("meta:"+br.String(), fmt.Sprintf("%d|%s", sniffer.Size(), sniffer.MimeType()))
if camli, ok := sniffer.Superset(); ok {
switch camli.Type {
case "claim":
if err := ix.populateClaim(br, camli, sniffer, bm); err != nil {
return err
}
case "permanode":
//if err := mi.populatePermanode(blobRef, camli, bm); err != nil {
//return err
//}
case "file":
if err := ix.populateFile(br, camli, bm); err != nil {
return err
}
case "directory":
if err := ix.populateDir(br, camli, bm); err != nil {
return err
}
}
}
return nil
}
func (c *FlatHaveCache) NoteBlobExists(br *blobref.BlobRef, size int64) {
c.mu.Lock()
defer c.mu.Unlock()
if size < 0 {
panic("negative size")
}
k := br.String()
if c.m[k] == size {
// dup
return
}
c.m[k] = size
if c.af == nil {
var err error
c.af, err = os.OpenFile(c.filename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
if err != nil {
log.Printf("opening have-cache for append: %v", err)
return
}
}
// TODO: flocking. see leveldb-go.
c.af.Seek(0, os.SEEK_END)
c.af.Write([]byte(fmt.Sprintf("%s %d\n", k, size)))
}
// Errors returned are:
// os.ErrNotExist -- blob not found
// os.ErrInvalid -- not JSON or a camli schema blob
func (fs *CamliFileSystem) fetchSchemaSuperset(br *blobref.BlobRef) (*schema.Superset, error) {
blobStr := br.String()
if ss, ok := fs.blobToSchema.Get(blobStr); ok {
return ss.(*schema.Superset), nil
}
rsc, _, err := fs.fetcher.Fetch(br)
if err != nil {
return nil, err
}
defer rsc.Close()
jd := json.NewDecoder(rsc)
ss := new(schema.Superset)
err = jd.Decode(ss)
if err != nil {
log.Printf("Error parsing %s as schema blob: %v", br, err)
return nil, os.ErrInvalid
}
if ss.Type == "" {
log.Printf("blob %s is JSON but lacks camliType", br)
return nil, os.ErrInvalid
}
ss.BlobRef = br
fs.blobToSchema.Add(blobStr, ss)
return ss, nil
}
func (c *SQLiteHaveCache) StatBlobCache(br *blobref.BlobRef) (size int64, ok bool) {
if br == nil {
return
}
// TODO(mpl): is it enough that we know it's a valid blobref to avoid any injection risk ?
query := blobSizeQuery + fmt.Sprintf("'%v';\n", br.String())
c.mu.Lock()
defer c.mu.Unlock()
err := c.startSQLiteChild()
if err != nil {
log.Fatalf("Could not start sqlite child process: %v", err)
}
_, err = c.w.Write([]byte(query))
if err != nil {
log.Fatalf("failed to query have cache: %v", err)
}
out, err := c.r.ReadString('\n')
if err != nil {
log.Fatalf("failed to read have cache query result: %v", err)
}
out = strings.TrimRight(out, "\n")
if out == noResult {
return
}
size, err = strconv.ParseInt(out, 10, 64)
if err != nil {
log.Fatalf("Bogus blob size in %v table: %v", haveTableName, err)
}
return size, true
}
func NewClaim(permaNode *blobref.BlobRef, claimType string) map[string]interface{} {
m := newCamliMap(1, "claim")
m["permaNode"] = permaNode.String()
m["claimType"] = claimType
m["claimDate"] = RFC3339FromTime(time.Now())
return m
}
// ScaledCached reads the scaled version of the image in file,
// if it is in cache. On success, the image format is returned.
func (ih *ImageHandler) scaledCached(buf *bytes.Buffer, file *blobref.BlobRef) (format string, err error) {
name := cacheKey(file.String(), ih.MaxWidth, ih.MaxHeight)
br, err := ih.sc.Get(name)
if err != nil {
return format, fmt.Errorf("%v: %v", name, err)
}
fr, err := ih.cached(br)
if err != nil {
return format, fmt.Errorf("No cache hit for %v: %v", br, err)
}
_, err = io.Copy(buf, fr)
if err != nil {
return format, fmt.Errorf("error reading cached thumbnail %v: %v", name, err)
}
mime := magic.MimeType(buf.Bytes())
if mime == "" {
return format, fmt.Errorf("error with cached thumbnail %v: unknown mime type", name)
}
pieces := strings.Split(mime, "/")
if len(pieces) < 2 {
return format, fmt.Errorf("error with cached thumbnail %v: bogus mime type", name)
}
if pieces[0] != "image" {
return format, fmt.Errorf("error with cached thumbnail %v: not an image", name)
}
return pieces[1], nil
}
func (h *SimpleBlobHub) NotifyBlobReceived(blob *blobref.BlobRef) {
h.l.Lock()
defer h.l.Unlock()
// Callback channels to notify, nil until non-empty
var notify []chan *blobref.BlobRef
// Append global listeners
for ch, _ := range h.listeners {
notify = append(notify, ch)
}
// Append blob-specific listeners
if h.blobListeners != nil {
blobstr := blob.String()
if set, ok := h.blobListeners[blobstr]; ok {
for ch, _ := range set {
notify = append(notify, ch)
}
}
}
// Run in a separate Goroutine so NotifyBlobReceived doesn't block
// callers if callbacks are slow.
go func() {
for _, ch := range notify {
ch <- blob
}
}()
}
// Given a blobref and a few hex characters of the digest of the next hop, return the complete
// blobref of the prefix, if that's a valid next hop.
func (sh *Handler) ResolvePrefixHop(parent *blobref.BlobRef, prefix string) (child *blobref.BlobRef, err error) {
// TODO: this is a linear scan right now. this should be
// optimized to use a new database table of members so this is
// a quick lookup. in the meantime it should be in memcached
// at least.
if len(prefix) < 8 {
return nil, fmt.Errorf("Member prefix %q too small", prefix)
}
dr := sh.NewDescribeRequest()
dr.Describe(parent, 1)
res, err := dr.Result()
if err != nil {
return
}
des, ok := res[parent.String()]
if !ok {
return nil, fmt.Errorf("Failed to describe member %q in parent %q", prefix, parent)
}
if des.Permanode != nil {
if cr, ok := des.ContentRef(); ok && strings.HasPrefix(cr.Digest(), prefix) {
return cr, nil
}
for _, member := range des.Members() {
if strings.HasPrefix(member.BlobRef.Digest(), prefix) {
return member.BlobRef, nil
}
}
}
return nil, fmt.Errorf("Member prefix %q not found in %q", prefix, parent)
}
func (fi *FakeIndex) AddClaim(owner, permanode *blobref.BlobRef, claimType, attr, value string) {
fi.lk.Lock()
defer fi.lk.Unlock()
date := fi.nextDate()
claim := &search.Claim{
Permanode: permanode,
Signer: nil,
BlobRef: nil,
Date: date,
Type: claimType,
Attr: attr,
Value: value,
}
key := permanode.String() + "/" + owner.String()
fi.ownerClaims[key] = append(fi.ownerClaims[key], claim)
if claimType == "set-attribute" && strings.HasPrefix(attr, "camliPath:") {
suffix := attr[len("camliPath:"):]
path := &search.Path{
Target: blobref.MustParse(value),
Suffix: suffix,
}
fi.path[fmt.Sprintf("%s\x00%s\x00%s", owner, permanode, suffix)] = path
}
}
func newClaim(permaNode *blobref.BlobRef, t time.Time, claimType string) Map {
m := newMap(1, "claim")
m["permaNode"] = permaNode.String()
m["claimType"] = claimType
m.SetClaimDate(t)
return m
}
func NewShareRef(authType string, target *blobref.BlobRef, transitive bool) Map {
m := newMap(1, "share")
m["authType"] = authType
m["target"] = target.String()
m["transitive"] = transitive
return m
}
func (fr *FileReader) getSuperset(br *blobref.BlobRef) (*Superset, error) {
if root := fr.rootReader(); root != fr {
return root.getSuperset(br)
}
brStr := br.String()
ssi, err := fr.sfg.Do(brStr, func() (interface{}, error) {
fr.ssmmu.Lock()
ss, ok := fr.ssm[brStr]
fr.ssmmu.Unlock()
if ok {
return ss, nil
}
rsc, _, err := fr.fetcher.Fetch(br)
if err != nil {
return nil, fmt.Errorf("schema/filereader: fetching file schema blob: %v", err)
}
defer rsc.Close()
ss, err = ParseSuperset(rsc)
if err != nil {
return nil, err
}
fr.ssmmu.Lock()
defer fr.ssmmu.Unlock()
fr.ssm[brStr] = ss
return ss, nil
})
if err != nil {
return nil, err
}
return ssi.(*Superset), nil
}
func (c *Client) FetchVia(b *blobref.BlobRef, v []*blobref.BlobRef) (io.ReadCloser, int64, error) {
pfx, err := c.prefix()
if err != nil {
return nil, 0, err
}
url := fmt.Sprintf("%s/camli/%s", pfx, b)
if len(v) > 0 {
buf := bytes.NewBufferString(url)
buf.WriteString("?via=")
for i, br := range v {
if i != 0 {
buf.WriteString(",")
}
buf.WriteString(br.String())
}
url = buf.String()
}
req := c.newRequest("GET", url)
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, 0, err
}
if resp.StatusCode != 200 {
return nil, 0, errors.New(fmt.Sprintf("Got status code %d from blobserver for %s", resp.StatusCode, b))
}
size := resp.ContentLength
if size == -1 {
return nil, 0, errors.New("blobserver didn't return a Content-Length for blob")
}
if c.via == nil {
// Not in sharing mode, so return immediately.
return resp.Body, size, nil
}
// Slurp 1 MB to find references to other blobrefs for the via path.
const maxSlurp = 1 << 20
var buf bytes.Buffer
_, err = io.Copy(&buf, io.LimitReader(resp.Body, maxSlurp))
if err != nil {
return nil, 0, err
}
// If it looks like a JSON schema blob (starts with '{')
if schema.LikelySchemaBlob(buf.Bytes()) {
for _, blobstr := range blobsRx.FindAllString(buf.String(), -1) {
c.via[blobstr] = b.String()
}
}
// Read from the multireader, but close the HTTP response body.
type rc struct {
io.Reader
io.Closer
}
return rc{io.MultiReader(&buf, resp.Body), resp.Body}, size, nil
}
func (dr *DescribeRequest) DescribeSync(br *blobref.BlobRef) (*DescribedBlob, error) {
dr.Describe(br, 1)
res, err := dr.Result()
if err != nil {
return nil, err
}
return res[br.String()], nil
}
func (tf *Fetcher) BlobContents(br *blobref.BlobRef) (contents string, ok bool) {
tf.l.Lock()
defer tf.l.Unlock()
b, ok := tf.m[br.String()]
if !ok {
return
}
return b.Contents, true
}
func (dr *DescribeRequest) addError(br *blobref.BlobRef, err error) {
if err == nil {
return
}
dr.mu.Lock()
defer dr.mu.Unlock()
// TODO: append? meh.
dr.errs[br.String()] = err
}
func (n *mutFile) setContent(br *blobref.BlobRef, size int64) error {
n.mu.Lock()
defer n.mu.Unlock()
n.content = br
n.size = size
claim := schema.NewSetAttributeClaim(n.permanode, "camliContent", br.String())
_, err := n.fs.client.UploadAndSignBlob(claim)
return err
}
func (dh *DownloadHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request, file *blobref.BlobRef) {
if req.Method != "GET" && req.Method != "HEAD" {
http.Error(rw, "Invalid download method", 400)
return
}
if req.Header.Get("If-Modified-Since") != "" {
// Immutable, so any copy's a good copy.
rw.WriteHeader(http.StatusNotModified)
return
}
fr, err := schema.NewFileReader(dh.storageSeekFetcher(), file)
if err != nil {
http.Error(rw, "Can't serve file: "+err.Error(), 500)
return
}
defer fr.Close()
schema := fr.FileSchema()
h := rw.Header()
h.Set("Content-Length", fmt.Sprintf("%d", schema.SumPartsSize()))
h.Set("Expires", time.Now().Add(oneYear).Format(http.TimeFormat))
mimeType := magic.MIMETypeFromReaderAt(fr)
if dh.ForceMime != "" {
mimeType = dh.ForceMime
}
if mimeType == "" {
mimeType = "application/octet-stream"
}
h.Set("Content-Type", mimeType)
if mimeType == "application/octet-stream" {
// Chrome seems to silently do nothing on
// application/octet-stream unless this is set.
// Maybe it's confused by lack of URL it recognizes
// along with lack of mime type?
rw.Header().Set("Content-Disposition", "attachment; filename=file-"+file.String()+".dat")
}
if req.Method == "HEAD" && req.FormValue("verifycontents") != "" {
vbr := blobref.Parse(req.FormValue("verifycontents"))
if vbr == nil {
return
}
hash := vbr.Hash()
if hash == nil {
return
}
io.Copy(hash, fr) // ignore errors, caught later
if vbr.HashMatches(hash) {
rw.Header().Set("X-Camli-Contents", vbr.String())
}
return
}
http.ServeContent(rw, req, "", time.Now(), fr)
}
func (fi *FakeIndex) GetBlobMimeType(blob *blobref.BlobRef) (mime string, size int64, err error) {
fi.lk.Lock()
defer fi.lk.Unlock()
bs := blob.String()
mime, ok := fi.mimeType[bs]
if !ok {
return "", 0, os.ErrNotExist
}
return mime, fi.size[bs], nil
}
// returns os.ErrNotExist on cache miss
func (s *storage) fetchMeta(b *blobref.BlobRef) (*metaValue, error) {
v, err := s.index.Get(b.String())
if err == index.ErrNotFound {
err = os.ErrNotExist
}
if err != nil {
return nil, err
}
return parseMetaValue(v)
}
func fetch(src blobref.StreamingFetcher, br *blobref.BlobRef) (r io.ReadCloser, err error) {
if *flagVerbose {
log.Printf("Fetching %s", br.String())
}
r, _, err = src.FetchStreaming(br)
if err != nil {
return nil, fmt.Errorf("Failed to fetch %s: %s", br, err)
}
return r, err
}
// uploadFilePermanode creates and uploads the planned permanode (with sum as a
// fixed key) associated with the file blobref fileRef.
// It also sets the optional tags for this permanode.
func (up *Uploader) uploadFilePermanode(sum string, fileRef *blobref.BlobRef, claimTime time.Time) error {
// Use a fixed time value for signing; not using modtime
// so two identical files don't have different modtimes?
// TODO(bradfitz): consider this more?
permaNodeSigTime := time.Unix(0, 0)
permaNode, err := up.UploadPlannedPermanode(sum, permaNodeSigTime)
if err != nil {
return fmt.Errorf("Error uploading planned permanode: %v", err)
}
handleResult("node-permanode", permaNode, nil)
contentAttr := schema.NewSetAttributeClaim(permaNode.BlobRef, "camliContent", fileRef.String())
contentAttr.SetClaimDate(claimTime)
signed, err := up.SignBlob(contentAttr, claimTime)
if err != nil {
return fmt.Errorf("Failed to sign content claim: %v", err)
}
put, err := up.uploadString(signed)
if err != nil {
return fmt.Errorf("Error uploading permanode's attribute: %v", err)
}
handleResult("node-permanode-contentattr", put, nil)
if tags := up.fileOpts.tags(); len(tags) > 0 {
errch := make(chan error)
for _, tag := range tags {
go func(tag string) {
m := schema.NewAddAttributeClaim(permaNode.BlobRef, "tag", tag)
m.SetClaimDate(claimTime)
signed, err := up.SignBlob(m, claimTime)
if err != nil {
errch <- fmt.Errorf("Failed to sign tag claim: %v", err)
return
}
put, err := up.uploadString(signed)
if err != nil {
errch <- fmt.Errorf("Error uploading permanode's tag attribute %v: %v", tag, err)
return
}
handleResult("node-permanode-tag", put, nil)
errch <- nil
}(tag)
}
for _ = range tags {
if e := <-errch; e != nil && err == nil {
err = e
}
}
if err != nil {
return err
}
}
return nil
}
func (ih *ImageHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request, file *blobref.BlobRef) {
if req.Method != "GET" && req.Method != "HEAD" {
http.Error(rw, "Invalid method", 400)
return
}
mw, mh := ih.MaxWidth, ih.MaxHeight
if mw == 0 || mh == 0 || mw > 2000 || mh > 2000 {
http.Error(rw, "bogus dimensions", 400)
return
}
var buf bytes.Buffer
var err error
format := ""
cacheHit := false
if ih.sc != nil {
format, err = ih.scaledCached(&buf, file)
if err != nil {
log.Printf("image resize: %v", err)
} else {
cacheHit = true
}
}
if !cacheHit {
format, err = ih.scaleImage(&buf, file)
if err != nil {
http.Error(rw, err.Error(), 500)
return
}
if ih.sc != nil {
name := cacheKey(file.String(), mw, mh)
bufcopy := buf.Bytes()
err = ih.cacheScaled(bytes.NewBuffer(bufcopy), name)
if err != nil {
log.Printf("image resize: %v", err)
}
}
}
rw.Header().Set("Content-Type", imageContentTypeOfFormat(format))
size := buf.Len()
rw.Header().Set("Content-Length", fmt.Sprintf("%d", size))
n, err := io.Copy(rw, &buf)
if err != nil {
log.Printf("error serving thumbnail of file schema %s: %v", file, err)
return
}
if n != int64(size) {
log.Printf("error serving thumbnail of file schema %s: sent %d, expected size of %d",
file, n, size)
return
}
}
func (dr *DescribeRequest) describedBlob(b *blobref.BlobRef) *DescribedBlob {
dr.mu.Lock()
defer dr.mu.Unlock()
bs := b.String()
if des, ok := dr.m[bs]; ok {
return des
}
des := &DescribedBlob{Request: dr, BlobRef: b}
dr.m[bs] = des
return des
}
func (b *DescribedBlob) PeerBlob(br *blobref.BlobRef) *DescribedBlob {
if b.Request == nil {
return &DescribedBlob{BlobRef: br, Stub: true}
}
b.Request.lk.Lock()
defer b.Request.lk.Unlock()
if peer, ok := b.Request.m[br.String()]; ok {
return peer
}
return &DescribedBlob{Request: b.Request, BlobRef: br, Stub: true}
}
func (cf *CachingFetcher) faultIn(br *blobref.BlobRef) error {
_, err := cf.g.Do(br.String(), func() (interface{}, error) {
sblob, _, err := cf.sf.FetchStreaming(br)
if err != nil {
return nil, err
}
defer sblob.Close()
_, err = cf.c.ReceiveBlob(br, sblob)
return nil, err
})
return err
}